New BMC state related interfaces

The changes introduce the following:
   - New keywords to check and put BMC in required state.

Change-Id: Icbdc8ccf494f5921b7cc7971ee936f372c0c813a
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/data/variables.py b/data/variables.py
index c0340bb..55eb8c0 100644
--- a/data/variables.py
+++ b/data/variables.py
@@ -18,6 +18,8 @@
 TIME_MANAGER_URI = OPENBMC_BASE_URI + 'TimeManager/'
 
 # State Manager base variables.
+BMC_REBOOT_TRANS = 'xyz.openbmc_project.State.BMC.Transition.Reboot'
+
 HOST_POWEROFF_TRANS = 'xyz.openbmc_project.State.Host.Transition.Off'
 HOST_POWERON_TRANS = 'xyz.openbmc_project.State.Host.Transition.On'
 HOST_POWEROFF_STATE = 'xyz.openbmc_project.State.Host.HostState.Off'